Improved ventilator



'PATENTBD DEC. 6, 1864.

E. H. STRONG. VENTILATOR.

UNITED STATES PATE T. OFFICE.

n. H. srnone, oFJAnEsvILnn,wrseonsrn.

lMPFtQVED VENTILATOl-ft I Specification forming part of Letters Patent No 45,357 dated Decemberbf, 186% To all 'whom it may concern I Beit known that'L'E. H. STRONG,-ef the city .of Janesville, in the county of Rock'and State of Wisconsin, have invented a'new and Improved Mode of Constructing and Operating aVentilator; and I do hereby declare that the following is a full, clear, andexact description thereof, reference. bein'ghad to the accompanying drawings, making apart of this specification, like characters referring to like parts in each figure. l

The nature of n y invention consists, tirst, in arranging a series of ejecting-surfaces in the form of frusturns of cones of varyin g diameters and widths, at such an angle with the hori-. zen and with-one[another, and such a distance apart, and ,aelsuch. an angle with the cap, as to securea steady upward, or, by reversion of the severalfparts, adownward, current 'of air; secoinhin eom-bining tapering curvilinear air-tubes, with a series of ejectingsurfaces, of a forur nearly corresponding with a flattened cone, of which the upper frustum,

B, forms one side, and terminating a certain proportionate distance inside of the dischargepipe, and cut at their apex by a plane passing through them at a. specific angle with the upper one of the series of ejecting-surfaces, so as to destroy and prevent spiral currents of air, .and secure an upward, or, by revers1on,a

downward, current, regardless of the force or angle at which the wind impinges upon it,

To enable others skilled in the art to make and use my invention, I will proceed tode scribe its construction and operation by re -ferring to the accompanying drawings, in

Which- Figure l is a tbp view of the ventilator. Fig. 2 is' a top View having the shield A, Figs. 1 and 4, removed, and a part of the upper ejectingsurt'ace broken away, so as to show one of the tapering curvilinear air-tubes, D, in section. Fig.3 is a view; of the under side of the ventilator, having the under ejectings'urface broken away, showing the general form of the tapering airf-tubes D. Fig. 4 shows avertical half-elevation and half-section ot' the ventilator, representing its general construction and angles;

- In order to out the several parts hereinbefore mentionedj in a proper manner, and arrange them in their proper positions, and at their relative angles, so as to secure the reof the shield or.cap, which maybe made in elect 1 B, Figs. 1, 2, 3, and-4, shows the upper ejectingsurt'ace or frustum of cone. Tolnake this in the proper form we'takeas aradius ninetenths v anddescribe a circle, which gives the one or more parts, as the, constructor. shall inside size and form. For thc'outside, a ra dies of fifteentenths is taken, which gives as thewidth or height of the frustum, six-tenths, measured on the surface. Remove from this rim an are equal to what would be included between two radii, diverging t'rom the center at an angle of one hundred and twenty-one degrees, which will make the inside diameter of thisfrustum when finished two tenths larger than thelliaineter ot' the discharge-pipe E, Figs. 2, 3, and 4.

0, Figs. 2, 3, and 4, shows the lower ejectingsurt'ace er t'rustum of cone. To get the form' of this t'rustum, we take, as for the other, ninetenths for radius of inside circle and thirteententh's for radius of outside, making it fourtenths wide or high, measured on the surface.

Remove from this rim an arc equalto what wouldbe included between two radii, diverging from the center atan angle of one hundred and fit'tyeight degrees, which will make the inside diameter of this frustuin equal to the diameter of the discharge-pipe E, Figs. 2, k

3, and 4.

0 represents rivets used in the construction of the cap or ventilator.

1) are curvilinear air-tubes, in form corre spending with afiattened cone, the upper side of which is formed by securing it to the upper frustuln or ejecting-surface, B, by flanges b and rivets c, as shown at 1), Fig. 2, or by an equivalent device securin g the upper and lower t'rustums together, as shown. T 1

gct'the proper form otthese curvilinear airtubes D, we take as a radius twelve-tenths and sweep a circle whose arc shall be equal 'to the radius, and draw lines to the center.

Bisect this are. and draw a line to the center, Now, measure down flOIIL the outside on this lastliuc toward the center nine-tenths and draw a line atright angles to it, and make the line one-half-tenth long. Now, draw a line parallel with each of the sides and a sufficient distance from them to make a flange, b, Fig. 2. Measure from the outside toward the center on this line six-tenths irom this point, draw lines to the end of the line crossing the center or bisecting line at right angles, cut,

form, and secure to the other parts, as afore described-the inside opening or space be,

tween the two frustuins, and between the upper frustrum and cap or shield, being three tenths.

E, Figs. 2, 3, and 4, represents the dischargepipe, which is in length six-tenths.

a, Fig. 4, shows the standards secured to the upper ejecting-surface or frustum, and to the shield or cap A, Figs. 1 and 4, supporting the shield 'or cap as shown. r

d, Figs. 3 and 4, is a metallic rim, taking bearing on the, raised projection e of the tube E, extending to, and giving bearing and support to, the lower ejecting-surface or frustuin U. v

f marks the base-opening to the air-fines D.

g shows the manner of securing the air- Q tube E to the lower ejecting-surface, O, by I turning it over the edgcpt' the latter, as there shown.

I am aware that series of frustums of cones of equal widths, arranged at equal angles with each other, protected with acap or shield of various forms ha-ve-been used for ejecting and injecting air, and also that air-tubes, or

frustums of. cones, perfect in themselves, and introduced between ejecting-surfaces, have also been employed, aiming to secure the results herein set forth and fully attained. I

do not therefore claim a ventilator, irrespect- Y ive of the manner and form of its construction and principle of operation; but

I do c1aim The combination of a ser es of tapering curvilinear air-tubes, of a form nearly corresponding with a flattened cone, with a series of ejecting orinjecting surfaces, of which the upper frustum, B, forms one section of the cone, and terminating a certain proportionate distance inside of the discharge-pipgand cut at their apex by a plane passing through 

